HD66781 Datasheet, PDF (144/196 Pages) Renesas Technology Corp – 720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM

HD66781
Preliminary
Transfer synchronization function for a 6-bit bus interface
The HD66781 incorporates a transmission counter to count the first, second, third data transmissions in 6-
bit RBG interface mode. The transmission counter is always reset to the first transmission on the falling
edge of the VSYNC. When a discrepancy occurs in the transmission of first, second and third data, the
counter is reset to the first data transmission at the start of each frame (the falling edge of VSYNC) and the
data transmission restarts in the correct order from the next frame. In case of displaying moving pictures,
which requires consecutive data transfer, this function minimizes the effect from the discrepancy in the data
transmission and facilitates to return to the normal display.
VSYNC
ENABLE
DOTCLK
PD17-0
2^nd
Transmission ^{Transfer synchronization}
1^st
2^nd
3^rd
1^st
2^nd
3^rd
Trans- Trans- Trans- Trans- Trans- Trans-
mission mission mission mission mission mission
6-bit Transfer Synchronization
Rev.0.5, July.31.2003, page 144 of 196